Hi all. In Etsy we try to use as many keywords as we can think of. This really helps there and if I have more keywords as suggested by Marmalead (love that tool) then I create a new listing and use those keywords, too. I have had wild success with this in the past.
I don't know about Shopify, though. Currently I created a listing for basic photo editing and for simple photo editing, using various keywords throughout each listing to make sure I covered anything customers might be searching for. Is this an ok way to do it here or should I just pack keywords neatly and in a sensical way into one listing?